System-response-and-system-stability

代码说明：

  程序1实现几个简单函数的响应序列； 程序2实现了两个不同序列的输出响应； 程序3给出了简单序列的零极点图以及输出响应。(Program a response sequence to achieve a few simple functions Procedure 2 implements two different sequences in response to the output Program 3 shows the output response of the pole-zero diagram and simple sequence)